Dipole antenna

design and simulation of simple dipole antenna

1. SIMPLE DIPOLE ANTENNA DESIGN AND SIMULATION Vengalam Mahendra

2. AIM The aim is to design and simulate a basic dipole antenna on a given ‘frequency’ and study the radiation properties and frequency responses through various antenna parameters i.e.., relative Dielectric constant (ε r ), substrate thickness (t) .

3. Technical objective There are several important antenna characteristics that should be considered when choosing an antenna for your application as follows: 1).Antenna radiation patterns 2).Gain 3).Frequency response

4. DESCRIPTION Half wave dipole antenna consists of two identical conductive elements such as metal rods which are bilaterally symmetrical. The "half-wave" term means that the length of this dipole antenna is equal to a half-wavelength at the frequency of operation. It is basically fed in the center where the impedance falls to lowest. The voltage and current levels vary along the length of the radiating section of the antenna. For a dipole antenna that is an electrical half wavelength long, the inductive and capacitive reactance cancel each other and the antenna becomes resonant.

5. DESIGN Design and simulate a basic dipole antenna on a given frequency f (GHz )=3.3 Length of dipole = Width of dipole =  

6. SIMULATION Designed for 3.3 GHz operation on a substrate with 1.6 mm thickness . =90.9mm where c=3* mm Each Arm length= /4=22.725mm Each width of arm= /20=4.545mm  

7. RETURN LOSS GAIN

8. RADIATION MECHANISM A half-wave dipole antenna receiving power from a radio wave. The electric field of the wave ( E) pushes the electrons in the antenna elements and charging the ends of the antenna alternately positive and negative. Since the antenna is a half-wavelength long at the radio wave's frequency, it excites standing waves of voltage ( V) and current in the antenna. These oscillating currents flow down the transmission line into the radio receiver (represented by the resistor R ).

9. CONCLUSION The aim of our project is to design & simulation of Dipole antenna. The measured antenna gain reaches about 2.732 dB. From the simulation results, it shows that operates in 2.8GHz with a return loss of -14.50dB